Drawers of small vessels containing dash of rum (9)

'drawers' is the definition.
(sketcher is a kind of drawer)

'small vessels containing dash of rum' is the wordplay.
'small' becomes 's' (abbreviation - e.g. clothes size).
'vessels' becomes 'ketches' (ketch is a kind of vessel**).
'containing' is an insertion indicator.
'dash of' indicates taking the first letters.
The initial letter of 'rum' is 'r'.
'ketches' going around 'r' is 'ketchers'.
's'+'ketchers'='SKETCHERS'

'of' is the link.